Well Rami, this is what I was complaining about. Apparently the
tuning range (impedance matching range) of the FC40 is quite narrow
as compared to other ATU's. I think it is only 15-600 Ohms Z. Don't
know about reactance tuning.
THis is why it mostly does not tune well on all bands for a given
wire length. One thing that can help id putting a 4:1 or 9:1 UNUN
between the wire and the ATU.
Jan
ON3ZTT
--- In YaesuTuner@..., "oh6bi" <oh6bi@...> wrote:
Hi.
It was week ago I had HAM weekend with my friend at cottage.
My friend wanted to test his Icom rig in low level QRM QTH.
So, I took my AH3 tuner (almost similar as FC40) to cottage for him.
The 23 meter wire I found good during my earlier tests was used
with
AH3 and Icom radio.
I dont member exactly how 23wire was working during last year
tests,
but there was some frequencies where FC40 didnt tune. Those FRGs
were
tuned perfectly with AH3. And FRGs what I never tested with FC40
was
tuned well by AH3. Even the down end 1.8 MHz was tuned nicely.
This FC 40 compared to AH3 has smaller coils and should be compare
with icom AH4. Unfortunately I dont have AH4, just 2 pcs
AH3 and one FC40.
I am not telling that FC40 is not good. I try to tell that the HAM
has to know his stuff and make the things working.
There is NO Perfect tuner what can tune everything.
FC40 is goog stuff for Yaesu radios, but have to think how to use
it.
73s es GL DX de rami, oh6bi
